Asymmetric reheating from a symmetric inflationary potential
arXiv:2107.04045 · doi:10.1103/PhysRevD.105.043506
Abstract
We explore a model of two-field inflation with nonminimal kinetic terms in which two identical matter sectors decoupled from each other may reheat to different temperatures while preserving the symmetry of the Lagrangian. This scenario is motivated by mirror dark matter models in which the temperature of the mirror sector is constrained to be by big bang nucleosynthesis and the cosmic microwave background. For a given class of nonminimal kinematic terms, we find that the symmetric field trajectory is a repeller solution, such that any randomly-occurring asymmetry in the initial conditions is amplified by many orders of magnitude during inflation, far beyond what canonical power-law models can achieve. Isocurvature fluctuations are strongly suppressed in this model, but a --) tensor-to-scalar ratio could be observed in the near future. The range of potential parameters compatible with {\it Planck} constraints is shown to be much larger than in corresponding single-field models. This occurs through a mechanism for lowering the spectral index that we dub CTHC: curved trajectory at horizon crossing.
11 pages, 6 figures
References in corpus (16)
- BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
- Monodromy in the CMB: Gravity Waves and String Inflation
- Non-Gaussianities in two-field inflation
- The Powers of Monodromy
- Mirror particles and mirror matter: 50 years of speculation and search
- F-term Axion Monodromy Inflation
- Curvature and isocurvature perturbations from two-field inflation in a slow-roll expansion
- Multiple field inflation
- Curvature Perturbation Spectrum in Two-field Inflation with a Turning Trajectory
- P not PQ
- Affleck-Dine inflation
- Double Monodromy Inflation: A Gravity Waves Factory for CMB-S4, LiteBIRD and LISA
- Twin Higgs Portal Dark Matter
- Chaotic inflation and unitarity problem
- Tilt and Tensor-to-Scalar Ratio in Multifield Monodromy Inflation
- Fractional chaotic inflation in the lights of PLANCK and BICEP2